A genetic linkage map of the MJ × MO raspberry mapping population. A genetic linkage map of red raspberry from a cross of 'M. Jewel' × 'M. Orion' constructed from 22 microsatellites (SSRs) selected from the L × GM Rubus reference map (Graham et al 2006) and 95 AFLP markers. The map locates two phenotypic traits, resistance to the aphid Amphorophora idaei (A1) and dwarfing habit (dw). Mapping distances are given in centiMorgans (cM). Markers with segregation ratios deviating significantly from the expected ratios (P =< 0.05, 0.01, 0.001) are indicated with one, two or three asterisks respectively.